Belting



H. BRAMMER Oct. s, -194s.

Patented Oct. 5, 1948 UNITED STATES PATENT OFFICE- Application .July 18, 1944, .Serial No.. :545,416 In Great'ritain July 16, 1943 9- Claims. 4l

This vinvention relates to -power transmission belting of the type having transverse corruga- -tions'formed throughout-its length and especially lto belting of the type described in my prior -British Patents Nos. 301,602 and 405,375.

In the first named patent the belt is described as being formed of two rows of short pieces of leather bent or folded into -shape of an arch, -w-ith the crowns of each row -of arches-alternately opposite to each other -so that the free ends of one row of arches 'pass into the recesses of the opposite row, the ends of the two 'rows being retained in position by a cci-led spring arranged to pass through vcircular holes formed in the ends of the several arches; the :coiled spring being provided with -nuts and a lhook and eye at its ends for 4securing them together. In :the latter patent lengths or strips of material are folded transversely at intervals to form corrugations on the top and bottom faces of the ybelt 'and the cor- 'rugations are -maintained by a chain-like-element running longitudinally through the belt.

The object of this 'invention is to 'provideyan improved form of belt fastener and also improved belting.

Accordingly the belting is retained in itsassembled or finished form by Vbelt fasteners which Yare located in the transverse `walls of the belting 'between-the corrugations vand -each comprises al'ongitudinally extending piece with ends adaptedtc retainsaid :transverse `walls on the fastener. The ends of each of the fasteners may extend in opposite directions -or lboth in -one direction.

The invention includes flexible .-belting wherein the belt fasteners are located in the side edges of the transverse walls on bothside faces of the belting. 'Moreover the ends of the fasteners may extend vinwardly across the walls 'of the belting from the side faces.

According'to la feature of the invention the belt fasteners are .of .flatstrip .or -wire formation with integral or separate ends.

A belt fastener may comprise a body portion with separate or integral ends adapted to form vshape maintaining or filler members to enter the belting from .each side face.

Referring .now to .the accompanying drawing in which -several .embodiments of the 'invention are shown .by way `of example only: Y

Fig. l is a side elevation of an improved V-belt of corrugated formation;

Fig. 2 is a sectional view on line 2-2 of Fig. 1;

Fig. 3 is a side elevation of a modified form of V-belt;

Figs. 4 and 5 are respectively sectional views i2 on line 4-1 of Fig. '3 with and without the .belt fasteners in position;

Fig. 6 is a plan of .a strip of .material cut 4to form a V-belt;

Fig. '7 is a side elevationo'f an ,improved l.corrugated V-belt built up `ofvslhort pieces;

Fig. .8K is a side elevation .of an .improved .cor rugated v-lbe'l't .built-of tubular pieces;

Fig. 9 vis asectional `viewonline .9-.9 of Fig. 8;

Figs. .10 and .l1 .arereSpecti-vely a side elevation and a part sectional .plan of fa modified V-.belt .built .up of tubularlpieces;

Figs. 12 and 13 `are .respectively aside elevation and 4a .part sectional .plan -.of .a further modified V--belt built up `of tubular pieces.

The belting inthe vconstruction .shown .in Figs. l and 2 is formed from .one or more long strips .I .of materialfe. g., .rubber textile material, leath; .er or -the like, folded lerbent to form transverse corrugations on the top -and'bottom faces of the .belting To retain -the icorrugations, 'slits 2 are formed in the side edges of `the Atransverse Awalls 3 of the belting and a ser-ies of .flat strip belt Afasteners 4 are slipped therein -to extendflongi- .tudinally Tof .the ybelting .for tying the walls 3 together. Theends 5 ofthe fasteners Va-re turned up `and down respectively to ybear against the ,faces 'of Ithefsaid `transverse Walls andthe fasteners may each be of a length to retain one or .more corrugations .as illustrated. ,Moreover the endslof the body portions of the fasteners overlap one another in Asome :or all fof .theslits depend-ing upon the type of fastener 'inuse which may -be all of one type or a combination as shown.

Some (-or allf) of .the -corrugat-ions are 'filled with ltransverse ller members '6 which are :cut

away at each end nto be held in position by kthe fasteners 4, .but may .iserve :to 'hold the fasteners dby small nails or other :means being passed `.through the .fasteners into the members vor by driV-ingfparts ci :the fasteners into vsaid members. The ends la ofthe belt are secured together Vin `any desired manner.

.In Vthe modification shnwn 4in Figs. '3 to 25 the 'fasteners `4.a :are vof round, square ior `otherpsectfion wire andpressed through :slits .2 in 'the edges of the aforesaid :transverse Walls into holes .'l. This form `o'fnastener has its ends '5 shaped, e. g., in the form of a `flat loop, to provide a goodibearing area and adapted to assume a vertical position. The nat loop ends 5 conform to the shape of the walls 3 (Fig. 3) and serve to maintain thedesired formation of belting. The ller members 6 (which in some belts are dispensed With) have slits 8 in their ends to receive the fasteners. A1-

ternatively, two short filler members, secured to, or integral with, the fastener body portions to form its ends, could enter each desired corrugation from the side faces of the belting to meet in the centre of the corrugation. Also the ends Ia of the belt are secured by the fasteners 4d although other fastening means may be employed.

The size, shape and distance between corrugations in the above types of belting may be modilied Without departing from the scope of the invention.

To make the above belting t V-pulleys it may be shaped after or prior to assembly. For the latter the edges of the strips I may be vandyked as shown in Fig. 6 or of undulating formation. If desired the belting may be of square section or rope like, i. e. substantially circular in cross section.

Belting could be formed as shown in Fig. '7 of short pieces 9 folded and fitted together in the form of two rows of U-shaped pieces of which the upper row is inverted. j Such pieces are held together by strip fasteners 4 located in slits in the edges of the transverse walls 3 in a similar manner to that described. The ends of each fastener in this case are turned in one direction.

`In any of the above constructions bearing washers or members may be fitted between the ends 5 of the fasteners and the belting.

In a further modification shown in Figs. 8 and 9 the belting is formed of tubular pieces II, cut from a length of reinforced or other tubing or hose (or fabricated), which are placed side by side to form a transversely corrugated length. The pieces are secured together by any of the aforesaid fasteners, or by wire fasteners 4a, which may simply anchor adjacent transverse walls 3 together, or extend across one or more tubular pieces and through the walls. Both arrangements may be combined as shown or one form of fastener used throughout the belt. The ends 5 of the fasteners are of straight formation and may bear against the inner faces of the transverse walls, or against raw hide or other bearing members I2, which may also serve to stiifen and/or retain the shape of the tubular pieces. Tubular filler members I3, or solid members I4 may be tted into some or all of the tubular pieces II. Alternatively, the ends 5 could be as shown in Fig. 4.

In Figs. to 13, tubular pieces I I are secured together by modified fasteners 4b. In Figs. 10 and ll each fastener comprises a body portion with a solid semi-cylindrical filler member Illa.

riveted thereto at each end. These fasteners are pressed into position from each side face of the belting until their body portions enter the holes I and each tubular piece is filled with four filler member-s la. Gaps could be left between the members if desired. Also the filler members could be integral parts of the fasteners. In Figs. l2k and 13 the construction is modified by making the filler members I3a of semi-cylindrical formation so that a tubular member of four parts is built up in each tubular piece II. The members ISa are integral, or separately riveted on parts of the fasteners 4b. Gaps could be left between the members I 3a so as to provide shape maintaining members instead of complete tubular filler members.

What I claim and desire to secure by Letters Patent is:

1. Power transmission belting comprising a plurality of hollow semi-cylindrical portions of flexible sheet material arranged side by side with their axes parallel to form a strip, said portions presenting successions of convex surfaces of said semi-cylindrical portions on two opposite sides of said strip, alined openings in the end edges of said semi-cylindrical portions, and fastening means seated in said openings, said fastening means each comprising a rectilinear portion eX- tending longitudinally of said strip through walls of at least two contiguous semi-cylindrical portions.

2. Belting as defined in claim 1 in which the successions of semi-cylindrical portions are the successive reverse turns of a continuous flexible strip.

3. Belting as defined in claim 1 in which the successions of semi-cylindrical portions are the rounded ends of U-shaped members.

4. Belting as defined in claim 1 in which the successions of semi-cylindrical portions are the rounded ends of U-shaped members, the space between the legs of each U-shaped member being occupied by the contiguous legs of two oppositely disposed U-shaped members.

5. Belting as deiined in claim 1 in which the successions of semi-cylindrical portions are the opposite halves of cylindrical members positioned side by side.

6. Belting as defined in claim 1 in which the semi-cylindrical portions contain shape main- Cil taining filling members.

7. Belting as deiined in claim 1 in which the fastening means comprises end members engaging the inner surfaces of the semi-cylindrical portions and serving to limit the spacing and maintain the shape thereof.

8. Bellting as defined in claim 1 comprising curved bearing members seated on the concave surfaces of the semi-cylindrical portions and held in place by the fastening means.

9. Belting as defined in claim 1 in which the fastening means each comprises a rectilinear portion and integral end portions shaped to seat against the inner surfaces of the semi-cylindrical portions and serving to maintain the shape thereof.

HARRY BRAMMER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,025,007 Wendling Dec. 17, 1935 2,231,920 Kelly Feb. 18, 1941 FOREIGN PATENTS Number Country Date 182,509' Great Britain July 3, 1922 209,145 Great Britain Dec. 31, 1923 269,659 Great Britain Apr. 21, 1927 301,602 Great Britain Dec. 6, 1928 405,375 Great Britain Feb. 8, 1934 834,049 France Aug. 1, 1938 

